loathly adverb 2adjective 1forms 2 adverb2 •In a loathsome manner; disgustingly. •Unwillingly; reluctantly. adjective1 •Loathsome; hideous.And Merlin answered, 'Overquick art thou / To catch a loathly plume fallen from the wing / Of that foul bird of rapine whose whole prey / Is man's good name: he never wronged his bride. — 1885 formsloathlier · loathliest